NG7538 IRS1 N: modeling a circumstellar maser disk
Abstract
We present an edge-on Keplerian disk model to explain the main component of the 12.2 and 6.7 GHz methanol maser emission detected toward NGC7538-IRS1 N. The brightness distribution and spectrum of the line of bright masers are successfully modeled with high amplification of background radio continuum emission along velocity coherent paths through a maser disk. The bend seen in the position-velocity diagram is a characteristic signature of differentially rotating disks. For a central mass of 30 solar masses, suggested by other observations, our model fixes the masing disk to have inner and outer radii of about 270 AU and 750 AU.
Keywords
Cite
@article{arxiv.astro-ph/0407388,
title = {NG7538 IRS1 N: modeling a circumstellar maser disk},
author = {M. R. Pestalozzi and M. Elitzur and J. Conway and R. Booth},
journal= {arXiv preprint arXiv:astro-ph/0407388},
year = {2009}
}
Comments
To appear in The Proceedings of the 2004 European Workshop: "Dense Molecular Gas around Protostars and in Galatic Nuclei", Eds. Y. Hagiwara, W.A. Baan, H.J. van Langevelde, 2004, a special issue of ApSS, Kluwer